KR101786638B1 - Actuator Unit Of Electronic Parking Brake and Electronic Parking Brake System contain the same, Electronic Parking Brake system control method - Google Patents
Actuator Unit Of Electronic Parking Brake and Electronic Parking Brake System contain the same, Electronic Parking Brake system control method Download PDFInfo
- Publication number
- KR101786638B1 KR101786638B1 KR1020160009602A KR20160009602A KR101786638B1 KR 101786638 B1 KR101786638 B1 KR 101786638B1 KR 1020160009602 A KR1020160009602 A KR 1020160009602A KR 20160009602 A KR20160009602 A KR 20160009602A KR 101786638 B1 KR101786638 B1 KR 101786638B1
- Authority
- KR
- South Korea
- Prior art keywords
- transmitting member
- power transmitting
- magnet
- parking brake
- rotation
- Prior art date
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/74—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/74—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive
- B60T13/748—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive acting on electro-magnetic brakes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H49/00—Other gearings
- F16H49/005—Magnetic gearings with physical contact between gears
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2400/00—Special features of vehicle units
- B60Y2400/30—Sensors
- B60Y2400/301—Sensors for position or displacement
- B60Y2400/3012—Sensors for position or displacement using Hall effect
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transportation (AREA)
- General Engineering & Computer Science (AREA)
- Braking Systems And Boosters (AREA)
- Braking Arrangements (AREA)
Abstract
An electronic parking brake system and a control method are disclosed. An electronic parking brake system according to one aspect of the present invention includes a motor, a final gear that rotates at a motor output, a first power coupled to the final gear so as to be axially movable relative to the final gear while being rotated by the final gear, A second power transmitting member that is coupled to the first power transmitting member such that axial movement occurs in response to the rotation of the first power transmitting member, a second power transmitting member that is coupled to the first power transmitting member, A support member fixed at a predetermined position in a state of being opposed to the magnet, an elastic member elastically interposed between the magnet and the support member to elastically support the first power transmitting member in the axial direction, And a Hall sensor spaced apart from the adjacent side of the magnet so as to detect the magnetic force of the magnet, (M is an N or a number of S poles) which is integrally rotatably mounted on an outer surface portion of a first power transmitting member and has N poles and S poles alternately formed in the rotating direction of the first power transmitting member, Pole magnet is used as the essential point of the constitution.
Description
The present invention relates to an electronic parking brake drive unit for providing power for activating or deactivating an electronic parking brake, an electronic parking brake system including the same, and a control method thereof.
Conventional puller type electromagnetic parking brakes include a magnet assembly mounted on one end of a movable shaft constituting a driving unit to measure a tension of a brake cable and a Hall sensor spaced apart from the adjacent side, .
In most cases, the magnet assembly is configured such that it can be mounted on a shaft through a bearing or move like a shaft in a separate form from a bearing so that the magnet assembly moves together with the axial movement of the shaft without rotating during the rotation of the shaft, A spring is mounted.
The spring is compressed when the parking brake is operated, and the parking cable that operates the brake actuating element with its reaction force maintains a predetermined tension. The parking cable is maintained in a taut state by the tension due to the compression of the spring, so that there is no large error in the cable tension measurement by the hall sensor.
However, when the brake is released, the return position of the magnet changes or the tension is excessively removed beyond the tension limit of the spring due to the restoration of the spring tension, so that an error occurs in the measurement of the cable tension by the sensor or the brake cable is excessively loosened there is a problem.
Furthermore, there is a problem that the time required for the parking brake operation or release becomes uneven due to the error in the measurement of the cable tension by the sensor, or the reaction speed is lowered as the brake operation time exceeds the prescribed time. There is a problem that the rear wheel is attracted due to failure to be released completely.
SUMMARY OF THE INVENTION It is an object of the present invention to provide an electronic parking brake drive unit having a sensing structure capable of minimizing a measurement error in cable tension measurement, an electronic parking brake system including the same, and a control method thereof .
According to an aspect of the present invention,
motor:
A final gear rotating with the motor output;
A first power transmitting member coupled to the final gear so as to be axially movable relative to the final gear while being rotated by the final gear;
A second power transmitting member coupled to the first power transmitting member such that axial movement occurs corresponding to rotation of the first power transmitting member;
A magnet coupled to an outer surface of the first power transmitting member to move in the axial direction together with the first power transmitting member;
A support member fixed at a predetermined position in a state of facing the magnet;
An elastic member elastically interposed between the magnet and the support member and elastically deformed corresponding to the axial movement of the first power transmitting member; And
And a Hall sensor disposed on an adjacent side of the magnet to detect a magnetic force of the magnet,
The magnet may be an annular two-pole or 2 * M (M is an N or S type) installed rotatably on the outer surface of the first power transmitting member and has N poles and S poles alternately arranged in the rotating direction of the first power transmitting member Number of poles) is provided.
Here, when the parking brake is released, the hall sensor may be disposed on the magnet adjacent side so that the edge of one side of the hall sensor is aligned with the leading edge of the magnet or the center of the magnet coincides with the center of the hall sensor.
According to another aspect of the present invention as a solution to the problem,
A parking brake drive unit according to one aspect;
A controller for deriving a forward / reverse rotation amount of the first power transmitting member from the hall sensor signal of the parking brake driving unit and feedback-controlling the motor by grasping the axial movement distance and position of the first power transmission member from the result of the calculation; And an electronic parking brake system.
Here, the conversion output unit compares the position value of the first power transmitting member, which is detected from the Hall sensor output value, with the previously inputted information, and converts the position value into the tension value of the brake cable connected to the second power transmitting member .
According to another aspect of the present invention as a solution to the problem,
A magnet rotation detecting step of detecting the rotation of the magnet rotating together with the first power transmitting member when the motor is driven through the hall sensor;
A first power transmitting member position grasping step of grasping an axial moving distance and a position of the first power transmitting member in consideration of a screw pitch of the first power transmitting member and the second power transmitting member engaging part from the rotation of the detected magnet; And
A motor stop control step for determining that the parking brake function is started or released when the position value recognized from the rotation amount or the rotation amount of the first power transmitting member reaches the preset value and performing control for stopping the motor The present invention provides a control method of an electronic parking brake system including a parking brake system.
Here, the output value conversion step of comparing the position value of the first power transmitting member, which is detected from the hall sensor output value, with the previously input information and converting the position value into the tension value of the brake cable connected to the second power transmitting member can do.
In the motor stop control step, when the position value recognized from the amount of rotation or the amount of rotation of the first power transmitting member reaches the pre-input set value and it is determined that the parking brake is released, A control may be performed so that the motor is stopped after a further rotation of the transmitting member by a predetermined number of revolutions.
According to the present invention, it is possible to precisely control the position of the first power transmitting member by the sensing structure that minimizes the measurement error in the measurement of the cable tension. Accordingly, when the parking brake is released, It is possible to prevent the brake cable from being loosened and the noise from being generated due to excessive removal of the tension beyond the limit.
Further, by controlling the amount of rotation of the first power transmitting member (shaft) to implement the parking brake actuation / disengagement, compared with the conventional manner in which the brake operation is controlled only by the axial movement distance of the first power transmitting member, So that the overall reliability of the parking brake system can be further improved.
Particularly, since the amount of axial movement of the first power transmitting member can be more accurately and finely controlled by the amount of rotation control, the time taken to operate or release the parking brake becomes uneven, or the brake operation time exceeds the prescribed time And the release of the incomplete parking brake due to the detection error and the subsequent rear wheel dragging phenomenon can reliably be solved.
1 is a side view of an electronic parking brake drive unit according to an aspect of the present invention;
Fig. 2 is an enlarged view of the essential part of the present invention showing the positional relationship between the magnet and the Hall sensor in Fig. 1 and a preferred embodiment of the magnet. Fig.
Fig. 3 is an output diagram showing a change in output of the hall sensor over time when the magnet is rotated. Fig.
4 is a schematic view of an electronic parking brake system according to another aspect of the present invention including the above-described electronic parking brake driving unit of the present invention.
Fig. 5 is a block diagram sequentially showing a parking brake control process performed through the electronic parking brake system of Fig. 4; Fig.
Hereinafter, preferred embodiments of the present invention will be described in detail.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. It is to be understood that the terms "comprises", "having", and the like in the specification are intended to specify the presence of stated features, integers, steps, operations, elements, parts or combinations thereof, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, parts, or combinations thereof.
Also, the terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.
In addition, the terms " part, "" unit," " module, "and the like, which are described in the specification, refer to a unit for processing at least one function or operation, which may be implemented by hardware or software or a combination of hardware and software .
In the following description with reference to the accompanying drawings, the same reference numerals are given to the same constituent elements, and a duplicate description thereof will be omitted. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.
1 is a side view of an electronic parking brake drive unit according to a first embodiment of the present invention.
Referring to Fig. 1, the drive unit of the electronic parking brake includes a
The rotational power of the
The rotational power output by the
In other words, the
The second
That is, when the first
One
The second
A
Although not shown in the drawing, the
An elastic member (80) is provided between the magnet (60) and the support member (70). The
The
The
A sensor, preferably a
The
FIG. 2 is an enlarged view of the essential part of the present invention showing the positional relationship between the magnet and the Hall sensor in FIG. 1 and a preferred embodiment of the magnet.
2, when the parking brake is released, the
Of course, the
FIG. 3 is an output diagram showing changes in output of the Hall sensor over time when the magnet is rotated. In the case of using a two-pole magnet having N poles and S poles alternately arranged at a pitch of 180 degrees, Fig.
In the waveform signal of Fig. 3, a floor, a floor or a space between the valley and the valley means one rotation of the
The rotation amount of the first
3 (a) and 3 (b) according to the relative positions (X 0 , X 1 , the axial position of the magnet visible through the magnet rotation number) of the
An electronic parking brake system according to another aspect of the present invention will now be described.
4 is a schematic view of an electronic parking brake system according to another aspect of the present invention including the above-described electronic parking brake driving unit of the present invention.
Referring to Fig. 4, the electronic parking brake system according to another aspect includes a
Specifically, the
The rotation amount and the position value of the first
The position value of the first
Of course, a predetermined relation between the position value of the first
FIG. 5 is a block diagram sequentially illustrating a parking brake control process performed through the electronic parking brake system of FIG. 4;
Referring to FIG. 5 and FIG. 4, when the
The
If it is determined that the parking brake function is started or released when the position value recognized from the amount of rotation or the amount of rotation of the first
On the other hand, when the position value recognized from the amount of rotation or the amount of rotation of the first
The detection signal of the
According to the present invention, it is possible to precisely control the position of the first power transmitting member by the sensing structure that minimizes the measurement error in the measurement of the cable tension. Accordingly, when the parking brake is released, It is possible to prevent the brake cable from being loosened and the noise from being generated due to excessive removal of the tension beyond the limit.
Further, by controlling the amount of rotation of the first power transmitting member (shaft) to implement the parking brake actuation / disengagement, compared with the conventional manner in which the brake operation is controlled only by the axial movement distance of the first power transmitting member, So that the overall reliability of the parking brake system can be further improved.
Particularly, since the amount of axial movement of the first power transmitting member can be more accurately and finely controlled by the amount of rotation control, the time taken to operate or release the parking brake becomes uneven, or the brake operation time exceeds the prescribed time And the release of the incomplete parking brake due to the detection error and the subsequent rear wheel dragging phenomenon can reliably be solved.
In the foregoing detailed description of the present invention, only specific embodiments thereof have been described. It is to be understood, however, that the invention is not to be limited to the specific forms thereof, which are to be considered as being limited to the specific embodiments, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims. .
10: Motor 20:
30: final gear 40: first power transmitting member
50: second power transmitting member 60: magnet
70: support member 80: elastic member
90: Hall sensor 100: Brake cable
Claims (7)
The amount of forward / reverse rotation of the first power transmitting member is derived from the hall sensor signal of the parking brake driving unit, and the axial movement distance and position of the first power transmitting member are grasped from the result of the calculation, And a control unit,
The magnet detection signal by the Hall sensor is converted into a value of a DC component providing an AC component providing information on the amount of rotation of the first power transmitting member and a position information of the first power transmitting member through the circuit element or the software element,
When the position value recognized from the amount of rotation or the amount of rotation of the first power transmitting member reaches a preset value and is determined to be a parking brake release, the control unit controls the first power transmitting member And stops the motor after a predetermined number of turns of the parking brake system.
And a conversion output unit for comparing the position value of the first power transmitting member, which is obtained from the Hall sensor output value, with the previously inputted information, and converting the position value into a tension value of the brake cable connected to the second power transmitting member, Electronic parking brake system.
A first power transmitting member position grasping step of grasping an axial moving distance and a position of the first power transmitting member in consideration of a screw pitch of the first power transmitting member and the second power transmitting member engaging part from the rotation of the detected magnet; And
A motor stop control step for determining that the parking brake function is started or released when the position value recognized from the rotation amount or the rotation amount of the first power transmitting member reaches the preset value and performing control for stopping the motor ≪ / RTI >
Wherein the magnet detection signal by the hall sensor in the magnet rotation detection step includes an AC component providing information on the amount of rotation of the first power transmitting member through a circuit element or a software element and a DC component providing position information of the first power transmitting member , ≪ / RTI >
In the motor stop control step, when the position value recognized from the amount of rotation or the amount of rotation of the first power transmitting member reaches the pre-input set value and it is determined that the parking brake is released, Wherein the motor is stopped after the motor is further rotated by a predetermined number of revolutions.
And an output value converting step of comparing the position value of the first power transmitting member, which is grasped from the hall sensor output value, with the previously inputted information and converting the position value into a tension value of the brake cable connected to the second power transmitting member Control method of parking brake system.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020160009602A KR101786638B1 (en) | 2016-01-26 | 2016-01-26 | Actuator Unit Of Electronic Parking Brake and Electronic Parking Brake System contain the same, Electronic Parking Brake system control method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020160009602A KR101786638B1 (en) | 2016-01-26 | 2016-01-26 | Actuator Unit Of Electronic Parking Brake and Electronic Parking Brake System contain the same, Electronic Parking Brake system control method |
Publications (2)
Publication Number | Publication Date |
---|---|
KR20170089325A KR20170089325A (en) | 2017-08-03 |
KR101786638B1 true KR101786638B1 (en) | 2017-10-18 |
Family
ID=59655536
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1020160009602A KR101786638B1 (en) | 2016-01-26 | 2016-01-26 | Actuator Unit Of Electronic Parking Brake and Electronic Parking Brake System contain the same, Electronic Parking Brake system control method |
Country Status (1)
Country | Link |
---|---|
KR (1) | KR101786638B1 (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101508678B1 (en) * | 2014-03-31 | 2015-04-07 | 한국델파이주식회사 | Driving unit for electric parking brake |
-
2016
- 2016-01-26 KR KR1020160009602A patent/KR101786638B1/en active IP Right Grant
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101508678B1 (en) * | 2014-03-31 | 2015-04-07 | 한국델파이주식회사 | Driving unit for electric parking brake |
Also Published As
Publication number | Publication date |
---|---|
KR20170089325A (en) | 2017-08-03 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US10668912B2 (en) | Position determining method for a parking lock | |
US6513632B2 (en) | Park brake system for vehicles | |
JP5927794B2 (en) | Vehicle opening / closing body control device | |
US7441632B2 (en) | Force sensor and motor-driven parking brake apparatus using the same | |
JP4928080B2 (en) | Electric cable drive device and electric brake device | |
JP2007523309A (en) | Linear actuator | |
KR20150069065A (en) | electronic parking brake system and control method thereof | |
JP2006050885A (en) | Motor-driven cable driving device and motor-driven braking device | |
EP3109109A1 (en) | Driving unit for electronic parking brake | |
KR20110062633A (en) | Electrical parking brake for vehicle | |
KR101786638B1 (en) | Actuator Unit Of Electronic Parking Brake and Electronic Parking Brake System contain the same, Electronic Parking Brake system control method | |
KR101776252B1 (en) | Actuator Unit Of Electronic Parking Brake | |
KR101454925B1 (en) | Load response limit switch typed electrical parking brake system in vehicle | |
KR101296086B1 (en) | electronic parking brake system and control method thereof | |
US9061674B2 (en) | Braking system and method of detecting a failure of a brake actuator | |
JP7141224B2 (en) | WHEEL MODULE, MOVEMENT MECHANISM, AND CONTROL METHOD OF WHEEL MODULE | |
US10935090B2 (en) | Brake assembly and servo having the same | |
JP2017506867A (en) | Method and apparatus for detecting rotation angle and / or rotation speed of motor shaft of motor | |
KR101134902B1 (en) | electronic parking brake system | |
EP1695882A1 (en) | Operation input device | |
CN102371987A (en) | Efficiency measuring method of electrically operated parking brake in motor vehicle | |
KR20150117544A (en) | Motor control method of electronic parking brake system | |
KR20180074214A (en) | Load sensor for electronic parking brake | |
KR20110055802A (en) | Parking brake system | |
KR101849259B1 (en) | Torque sensing apparatus and method of electric power actuater with auto setting means |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A201 | Request for examination | ||
E902 | Notification of reason for refusal | ||
E701 | Decision to grant or registration of patent right | ||
GRNT | Written decision to grant |